Owners/service Manual Problems of Cadillac DTS

Vehicle locks itself. "checked" three times previously, nothing found. Then back passenger side lock faulty & replaced. On 6/2/15 I took my cat to the vet, removed the keys from the ignition, did not lock the door, placed the keys on the cat carrier, closed the driver's door, walked around to passenger side to get the cat. Before I could open passenger door, car locked itself. Witnesses 6-8 people, including myself, trying to either break a window or pick the lock. Citrus hts CA. Fire dept. Called. The back driver's 'side window was broken with a tool I have never seen before. Alarm did not go off. Neither the door buttons, the door unlock relay switch nor the door handles would work manually. After the glass was broken out and after the 3rd time trying the key, door unlocked/alarm went off. Fire dept said not to drive the car unless the window was open, so if I got locked in, I could at least get out. Car was towed to dealership. Rented an enterprise car (where auto was purchased/10,000 miles or so on it). I have overlapping warranties & auto insurance. Dealership cannot find any problem with car, I have to pay for the rental car. (because of this, enterprise extended the "courtesy" corporate rate of $980. 00 per month. Window glass appeared different from any other auto glass. It would not break. I am under the deductible for the auto insurance company & enterprise warranty will not cover the rental car unless something is found to be wrong with said car. Cat locked in car for 45 min. O/s temp was about 93 degrees. Cat had to be put to sleep. I do not want to retrieve/ drive the car for fear that I will be locked in and unable to get out. What if this had been a person? at this time, the car is with the dealership, who suggested that I buy a new car. Help!!!!!!!!!.

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